/Engine/Plugins/Experimental/PCG/Source/PCG/Public/Metadata/PCGMetadata.h
Set an attribute given a property and its value.
true if the attribute creation (if required) and the value set succeeded
bool SetAttributeFromDataProperty ( [FName](API\Runtime\Core\UObject\FName) AttributeName, [PCGMetadataEntryKey](API\Plugins\PCG\Metadata\PCGMetadataEntryKey) & EntryKey, const void * Data, const [FProperty](API\Runtime\CoreUObject\UObject\FProperty) * Property, bool bCreate )